Oswald is Lewis's slightly shorter, dark-haired friend is the dumb one of the double-act, which tends to be his most distinguishing characteristic. Lewis described him once as a "man-child stuck in a sort of prolonged adolescence." At one point Oswald trained to be a nurse, but he proved unsuitable. Oswald was a deejay at the beginning of the first season but later on became a delivery driver for Global Parcel (a fictional package-delivery service whose uniforms are modeled after those of UPS). His name is a play on Lee Harvey Oswald. In the episode Bus-ted, it is revealed that Oswald joined the group of friends to replace Adam, a childhood friend who fell through the ice on a lake.